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Acquisitions - Additional Information (Detail) - USD ($) $ in Millions					9 Months Ended
	Jan. 31, 2018	Jul. 28, 2017	May 04, 2017	Jan. 30, 2017	Sep. 29, 2018	Sep. 30, 2017	Dec. 30, 2017
Business Acquisition [Line Items]
Goodwill					$ 913.9		$ 924.1
Cash purchase price of acquisition, net of cash acquired					3.0	$ 82.9
George A. Sturdevant, Inc. (d/b/a Fastorq)
Business Acquisition [Line Items]
Cash purchase price of acquisition	$ 3.0
Goodwill					2.6
Torque Control Specialist
Business Acquisition [Line Items]
Cash purchase price of acquisition		$ 3.6
Goodwill					2.0
Cash purchase price of acquisition, net of cash acquired		$ 3.5
Norbar
Business Acquisition [Line Items]
Cash purchase price of acquisition			$ 71.6
Goodwill					25.1
Cash purchase price of acquisition, net of cash acquired			$ 69.9
BTC
Business Acquisition [Line Items]
Goodwill					$ 5.9
Cash purchase price of acquisition, net of cash acquired				$ 9.2

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Amount after accumulated impairment loss of an asset representing future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized.

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The cash outflow associated with the acquisition of business during the period. The cash portion only of the acquisition price.

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The cash outflow associated with the acquisition of a business, net of the cash acquired from the purchase.

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